Bugzilla

The only WebRTC site I know of that would screen-share cross-origin would be Jitsi, as I understand they have clients that iframe them. Those clients' users would be unable to present in conference calls using Firefox presumably. Unfortunately, I don't have a way to test this, since I'm not familiar with such a service, and their [main site](https://meet.jit.si/) is not iframed and works fine (I just tested it). Nils, do we have a Jitsi contact who could verify if this?

Apart from that, my guess is cross-origin use is rare, but it's hard to say, because `getDisplayMedia` barely registers in telemetry pagecounts. On beta 69, our usecounters show [~3%](https://georgf.github.io/usecounters/#kind=page&group=GETDISPLAYMEDIAXORIGIN&channel=beta&version=69) of `getDisplayMedia` calls are cross-origin, though pagecount totals are probably too low to infer anything from: they put overall usage at [0.000016%](https://georgf.github.io/usecounters/#kind=page&group=MEDIADEVICES&channel=beta&version=69) when Chrome says [0.0005%](https://www.chromestatus.com/metrics/feature/timeline/popularity/2619). So something is off there. Do we do telemetry on release?

The only WebRTC site I know of that would screen-share cross-origin would be Jitsi, as I understand they have clients that iframe them. Those clients' users would be unable to present in conference calls using Firefox presumably. Unfortunately, I don't have a way to test this, since I'm not familiar with such a service, and their [main site](https://meet.jit.si/) is not iframed and works fine (I just tested it). Nils, do we have a Jitsi contact who could verify if this is a problem?

Apart from that, my guess is cross-origin use is rare, but it's hard to say, because `getDisplayMedia` barely registers in telemetry pagecounts. On beta 69, our usecounters show [~3%](https://georgf.github.io/usecounters/#kind=page&group=GETDISPLAYMEDIAXORIGIN&channel=beta&version=69) of `getDisplayMedia` calls are cross-origin, though pagecount totals are probably too low to infer anything from: they put overall usage at [0.000016%](https://georgf.github.io/usecounters/#kind=page&group=MEDIADEVICES&channel=beta&version=69) when Chrome says [0.0005%](https://www.chromestatus.com/metrics/feature/timeline/popularity/2619). So something is off there. Do we do telemetry on release?